In a world where only ordinary princesses are in, there wanders the divergent one whom everybody refers to as tomboy. However, unlike the other tomboys as they call her, she dresses in sophistication. She is a brat. And you might not want to know the worst, she can't live without a slave. Their world quakes upon knowing that the Casanova, the prince of their world, becomes her helot. The Tomboy. The Lost. The Casanova. The Helot. It's where everything started-- their journey of love to the moon and back.